Plate for artificial teeth.



PATBNTED DEG. 3, 1907.

J. HUMPHRBY.

PLATE FOR ARTIFICIAL TEETH. APPITIOATION FILED MAR. 7, 1906.

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JAMES HUMPHREY, OF BOSTON, MASSACHUSETTS.

PLATE FOR ARTIFICIAL TEETH.

Specification of Letters Patent.

Patented. Dec. 3, 1907'.

Application filed March 7. 1906. Serial No. 304,638.

To all whom it may concern:

citizen of the United States, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Plates for Artificial Teeth, of which the following description, in connection with the accompanying drawing, is a specification, like letters on the drawings represent ing like parts.

This invention relates to false teeth, and has for its object to provide a novel construction for either the upper or lower set of teeth by means of which they will be firmly retained in position in the mouth.

Usually the palatal plate of the upper set is formed with a chamber which, when the teeth are in the mouth, forms with the palate or roof of the mouth a vacuum which assists in retaining the upper set of teeth in the mouth. The suction produced by this vacuum, however, is not always sufficient for this purpose, as during conversation and also during the process of mastication, the tongue is constantly being brought against the palatal plate and the teeth are very apt to be loosened thereby from the roof of the mouth and forced forward. In order to avoid this loosening of the teeth I have made my present invention, one embodiment of which will first be described and then the novel features thereof will be pointed out in the claims.

In the drawings, Figure 1 is a side view of an upper set of false teeth embodying my invention; Fig. 2 is a top plan view thereof;

Fig. 3 is a section on the lme 0ca:, Fig. 4 is a section on the line yy looking down.

3 is a palatal-plate of an upper set of teeth and 4 are the teeth. The plate 3 is made with the usual suction or palatal-chamber 6 which is for the purpose of forming with the roof of the mouth a vacuum chamber for holding the teeth in place.

In accordance with my invention I form the palatal-plate of the teeth with two sets of ribs 5 which extend inwardly from the sides of the chamber 6. These ribs do not extend clear to the center of the chamber 6, and, therefore, do not interfere in any way with the palatal-bone which extends along the center of the palate. The ribs 5 may, if desired, extend outside of the palatal-chamber, as seen in Fig. 2, and any number of ribs may be employed on either side of the palatal-plate. I have found from practice that when the palatal-plate is made with the ribs 5 extending into the suction chamber 6 from each side of the chamber the plate will be held more securely in the mouth than were the ribs omitted.

Having described my invention what I claim as new and desire to secure by Letters Patent is name to this specification, in the presence of two subscribing witnesses.

JAMES HUMPHBEY.

Witnesses:

Louis 0. SMITH, BERTHA F. HEUSER. 

